Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         [crown] Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
           Clade neomura Cavalier-Smith, 1987
             Domain Eukaryota Chatton, 1925 - eukaryotes
               Clade discaria Cavalier-Smith, 2021
                 Clade natates Cavalier-Smith, 2021
                   Clade photaria Cavalier-Smith, 2021
                     Clade eucorta Cavalier-Smith, 2021
                       Superkingdom Corticata Lankester, 1878 - corticates
                         Kingdom Plantae Haeckel (1866) - plants
                           Subkingdom Viridiplantae Caval.-Sm. (1981) - green plants
                             Phylum Chlorophyta Pascher (1914) [coordinate rank] - green algae
                               "core chlorophytes"
                                 Class Chlorophyceae Wille (1884) - chlorophytes
                                   Order Sphaeropleales Luerssen (1877)
                                     Family Scenedesmaceae Oltmanns
                                       Genus Crucigenia C. Morren (1830)
                                         01 Crucigenia australis Playfair
                                         02 Crucigenia cordata Playfair
                                         03 Crucigenia cruxmichaeli (Reinsch) Playfair
                                         04 Crucigenia fenestrata (Schmidle) Schmidle
                                         05 Crucigenia floralis Playfair
                                         06 Crucigenia lauterbornii (Schmidle) Schmidle
                                         07 Crucigenia quadrataᵀ C. Morren (1830)
                                         08 Crucigenia tetrapedia (Kirchner) W.West & G.S.West
                                         09 Crucigenia triangularis Chodat
                                         10 Crucigenia truncata G.M. Sm.
                                         11 Crucigenia unicellularis (Playfair) Playfair